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+**Create a new swap partition:**
+<code>
+fdisk /dev/sdb
+. press n to create a new disk partition,
+. press p to create a primary disk partition,
+. press 1 to denote it as 1st disk partition
+. press ENTER twice to accept the default of 1st and last cylinder – to convert the whole secondary hard disk to a single disk partition
+. press t (will automatically select the only partition – partition 1) to change the default Linux partition type to swap 82
+. press L to list all the currently supported partition type
+. press 82 (as per the L listing) to change partition 1 to 82 for Linux swap partition type
+. press p to display the secondary hard disk partition setup (1st partition is denoted as /dev/sdb1 in Linux)
+. press w to write the partition table and exit fdisk upon completion.
+# mkswap /dev/sdb1
+# swapon -av           ---- activate all swap
+# swapon -s            ---- show active swap
+# vi /etc/fstab  and add the following line:
+/dev/sdb2    swap   swap   defaults   0 0
+After modifying the fstab, always check if everything is mounting fine with :
+# mount -a
+</code>

Linux Edu Handbook